Annual report pursuant to Section 13 and 15(d)

Short-Term Revolving Lines of Credit (Details)

v2.4.1.9
Short-Term Revolving Lines of Credit (Details)
Mar. 31, 2015
Netherlands [Member]
USD ($)
Mar. 31, 2014
Netherlands [Member]
USD ($)
Mar. 31, 2015
India [Member]
USD ($)
Mar. 31, 2014
India [Member]
USD ($)
Mar. 31, 2014
Australia [Member]
USD ($)
Mar. 31, 2015
Japan [Member]
USD ($)
Mar. 31, 2014
Japan [Member]
USD ($)
Mar. 31, 2015
Revolving Credit Facility [Member]
USD ($)
Mar. 31, 2014
Revolving Credit Facility [Member]
USD ($)
Mar. 31, 2015
Euro Member Countries, Euro
Revolving Credit Facility [Member]
Netherlands [Member]
EUR (€)
Mar. 31, 2015
United States of America, Dollars
Revolving Credit Facility [Member]
Netherlands [Member]
USD ($)
Mar. 31, 2015
United States of America, Dollars
Revolving Credit Facility [Member]
India [Member]
USD ($)
Mar. 31, 2015
United States of America, Dollars
Revolving Credit Facility [Member]
Australia [Member]
USD ($)
Mar. 31, 2015
United States of America, Dollars
Revolving Credit Facility [Member]
Japan [Member]
USD ($)
Mar. 31, 2015
India, Rupees
Revolving Credit Facility [Member]
India [Member]
INR
Mar. 31, 2015
Australia, Dollars
Revolving Credit Facility [Member]
Australia [Member]
AUD
Mar. 31, 2015
Japan, Yen
Revolving Credit Facility [Member]
Japan [Member]
JPY (¥)
Short-Term Revolving Lines of Credit                                  
Maximum borrowing capacity                   € 4,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ thr_CountryAxis
= country_NL
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_CurrencyAxis
= currency_EUR
$ 4,341us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ thr_CountryAxis
= country_NL
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_CurrencyAxis
= currency_USD
$ 1,278us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ thr_CountryAxis
= country_IN
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_CurrencyAxis
= currency_USD
$ 250us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ thr_CountryAxis
= country_AU
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_CurrencyAxis
= currency_USD
$ 376us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ thr_CountryAxis
= country_JP
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_CurrencyAxis
= currency_USD
80,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ thr_CountryAxis
= country_IN
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_CurrencyAxis
= currency_INR
325,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ thr_CountryAxis
= country_AU
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_CurrencyAxis
= currency_AUD
¥ 45,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ thr_CountryAxis
= country_JP
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_CurrencyAxis
= currency_JPY
Outstanding borrowings $ 0us-gaap_LinesOfCreditCurrent
/ thr_CountryAxis
= country_NL
$ 0us-gaap_LinesOfCreditCurrent
/ thr_CountryAxis
= country_NL
$ 0us-gaap_LinesOfCreditCurrent
/ thr_CountryAxis
= country_IN
$ 0us-gaap_LinesOfCreditCurrent
/ thr_CountryAxis
= country_IN
$ 0us-gaap_LinesOfCreditCurrent
/ thr_CountryAxis
= country_AU
$ 0us-gaap_LinesOfCreditCurrent
/ thr_CountryAxis
= country_JP
$ 0us-gaap_LinesOfCreditCurrent
/ thr_CountryAxis
= country_JP
$ 0us-gaap_LinesOfCreditCurrent
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
$ 0us-gaap_LinesOfCreditCurrent
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember